学进去-教育应平等而普惠
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类型:听音,选择正确答案
难度系数:0.65
所属科目:小学英语
听录音,选择正确的答语。
____) 1. A. I go to bed at 9:00 p.m.        B. At 6:00 a.m.      C. I get up early.
____) 2. A. My weekend is so busy.       B. He often washes his clothes.       C. I often clean my room.
____) 3. A. Yes, I do.        B. Yes, I am.      C. I often go for a walk on the weekend.
____) 4. A. I wash my clothes at home.      B. Because my mum is so busy.        C. I often wash my clothes.
____) 5. A. I often go shopping.      B. I eat dinner at 5:30 p.m.        C. No, I don’t.
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y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2

用户名称
2019-09-19

y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2

用户名称
2019-09-19
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